Dynamics of Ordered Active Columns: Flows, Twists, and Waves
Soft Condensed Matter
2023-06-14 v3 Statistical Mechanics
Abstract
We formulate the hydrodynamics of active columnar phases, with two-dimensional translational order in the plane perpendicular to the columns and no elastic restoring force for relative sliding of the columns, using the general formalism of an active model H. Our predictions include: two-dimensional odd elasticity coming from three-dimensional plasmon-like oscillations of the columns in chiral polar phases with a frequency that is independent of wavenumber and non-analytic; a buckling instability coming from the generic force-dipole active stress analogous to the mechanical Helfrich-Hurault instability in passive materials; the selection of helical column undulations by apolar chiral activity.
Cite
@article{arxiv.2306.03695,
title = {Dynamics of Ordered Active Columns: Flows, Twists, and Waves},
author = {S. J. Kole and Gareth P. Alexander and Ananyo Maitra and Sriram Ramaswamy},
journal= {arXiv preprint arXiv:2306.03695},
year = {2023}
}